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Related Experiment Video

Updated: Jun 24, 2026

Single-cell Analysis of Bacillus subtilis Biofilms Using Fluorescence Microscopy and Flow Cytometry
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Single-cell Analysis of Bacillus subtilis Biofilms Using Fluorescence Microscopy and Flow Cytometry

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[Immunochemical study of subtilisins obtained from Bacillus subtilis A-50 and some of its mutants].

A I Logunov, L I Erokhina, L I Vaneeva

    Biokhimiia (Moscow, Russia)
    |December 1, 1978
    PubMed
    Summary

    Bacillus subtilis A-50 subtilisins share similar physico-chemical and antigenic properties with other strains, suggesting they form an isoenzyme system. This research explores the enzymatic characteristics and antigenic heterogeneity of these subtilisins.

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    Area of Science:

    • Microbiology
    • Enzymology
    • Protein Chemistry

    Background:

    • Subtilisins are serine proteases produced by Bacillus species.
    • Understanding the diversity and properties of subtilisins is crucial for biotechnological applications.
    • The Bacillus subtilis A-50 strain is a known producer of subtilisins.

    Purpose of the Study:

    • To characterize the physico-chemical and antigenic properties of subtilisins from Bacillus subtilis A-50.
    • To compare these properties with subtilisins from other strains.
    • To investigate the potential isoenzyme system of Bacillus subtilis A-50 subtilisins.

    Main Methods:

    • Physico-chemical analysis (proteolytic activity, electrophoretic mobility, molecular weight, inhibitor reactions).
    • Immunological experiments to assess antigenic properties.

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  • Comparison of enzymes from original and mutant strains.

    • Main Results:

    • Physico-chemical parameters of Bacillus subtilis A-50 subtilisins align with literature values for other strains.
    • Subtilisins from Bacillus subtilis A-50 with varying electrophoretic mobility exhibit similar antigenic properties.
    • Enzymes from mutant strains showed antigenic similarities to specific Bacillus subtilis A-50 fractions, though some heterogeneity was noted.

    Conclusions:

    • The subtilisins from Bacillus subtilis A-50 likely constitute an isoenzyme system.
    • Antigenic properties are conserved across different electrophoretic mobilities within the A-50 strain.
    • Mutant strains may exhibit antigenic variations within their subtilisin fractions.